Pressure-regulating device.



C. H. FULSUN.

PRESSURE REGULATING DEVICE.

APPLICATION FILED MAR. 3!. i917.

choker member has a restricted passage 11. 12- is the exit line to the press of uniform diameter throughout its length. 13 is a check valve. 14 is a continuation of the exit line which leads to the press. The check valve is not essential, but convenient in effecting certain other phases of operation of the press and has nothing to do with the present invention. This is also true of the cut-off .3. As shown a packing surrounding the Iunger 6 is employed to prevent escape of uid therefrom.

Method of operation.

The operation of the device is as follows: There is a pressure of 4,000 pounds per inch supplied from the high pressure accumulator, this entering the supply pipe 2. The liquid passes through the pipe and surrounds the plunger 6 and the abutment 8. It passes up through the restricted passage 11 through the tubes 12 and 1% into the exit tube. During the first part of the operation the change valve prevents passage of oil to pipe 2. When the change valve is moved to cut 05 low pressure Oll. and admit high pressure oil it will be supplied from the high pressure accumulator through the pipe 2. As the oil passes through the restricted passage 11 the unbalanced pressure rises until finally it exceeds the force of the spring 5. Then the plunger 6 and the head 10 of the valve move to the position of 1B ig. 2, thus opening wide the passage to the oil, and the pressure may rapidly increase to 42,000

pounds, the pressure of the accumulator. When the meal has been pressed to extract all the oil the pressure from the accumulator is released and then the spring 5 promptly forces the choker valve back to the position of Fig. 1. h It will be seen that at each operation of the press the oil is permitted to move rapidly past the choker valve, thereby flushing it and cleaning out any foreign matter which may have lodged in the passageway 11.

The invention depends on the unbalanced pressure on the plunger 6. It will be seen that the lower end of this plunger passes through the casing into the open air and thus the oil pressure on the top of the device may tend to force it down. This is resisted by the spring 5, but as soon as the pressure of the oil is superior to the strength of the spring the choker valve opens widerapidly and remains open until the pressure drops again by the shutting oil of the supply of oil. The action of the plunger 6 does not at all depend on an excess of pressure on one side of the abutment 8 over the pressure on the other side. In fact, the pressure on both sides is substantially equal except for the slight drop of pressure caused by the small size of the passage 11. The oil flows readlly pastthe abutment 8 and exerts no pressure 1n either direction thereon.

Having thus fully described my invert tion, what i claim as new and desire to secure by Letters Patent, is:-

- 1. in a device of the character described, the combination, with a body having oil passages, a choker valve seat, a valve member, resilient means to keep said valve member seated, a restricted passageway communicating with the respective oil passages on each side of said valve whereby the fluid flows through the restricted passage from one side of the valve to the other until the oil pressure is sufiicient to overcome the valve seating means when the valve is thrown completely open the passage of the oil is unrestricted.

2, Th a device of the character described, the combination, with body having oil passages and a choker valve seat, the passage at one side of the seat being smaller than at the other side or"; the seat, a choker valve adapted to cooperate with said seat and terminating in a. face corresponding with the smaller diameter of the oil passage, 9. spring acting to seat said choker valve, a reduced. passage communicating with said oil passages, whercby a reduced flow is permitted until the oil pressure overcomes the spring and the valve is thrown wide open.

3. In a device of the character described, the combination, with a body having oil passages and a choker valve seat, a passage at one side of the seat, the passage on the exit side of the seat being smaller than on the inlet side, a restricted passage communicating with said inlet and outlet passages through which the oil normally flows, a choker valve adapted to coiiperate with said seat and terminating in a face corresponding to the smaller diameter of the exit passage, and a spring acting to rnaini'a.. i said choker valve on its seat, whereby when the oil pres sure overcomes the spring the valve is thrown wide open and the oil flows by without restriction.

4. in a device of character described, the combination, with a body having oil passages and a choker valve seat, a passage at one side of the seat, the passage on the exit side of the seat being smaller than on the inlet side, a. restricted passage communicating with. said inlet and outlet passages through which the oil normally flows, a choker valve adapted to coiperate with said seat of the same diamcter throughout its body save with a smaller face corresponding with the smaller diameter of the exit oil passage, and spring acting to maintain said choker valve on its seat, whereby when the oil pressure overcomes the spring, the valve thrown wide open and the oil iioWs by without restriction.

5. In a device of the character described, the combination, with an inlet oil passage of one diameter and outlet passage of a mews fer keeping" said valve men smaller diameter, a valve seed, e vvdve mem ber eoeperetilng with said seed valve member having a restricted peesage therein which eommumcetes "with said inlet end em;- lei; passages end said valve member being of the same diameter throughout its length save where one end is reduced to tire size 3" the exit passage and the other end is dueed fse pass through said bed hey." vv en it my smggmm'ureu 

